Freezing and Repetetive Audio

I am currently at about 750 Villagesr on Level IV and the game has started doing micro- freezing and repetitive audio at very frequent intervals, like every 3 to 4 minutes. I am aware the game is NOT optimized as yet, but was wondering if anybody has a fix. It is not my PC, Memory usage 17% and my CPU maximum is 27%. I am also running the game on a Gen 4 SSD. A complete restart fixes it temporarily. But after about 20 minutes the stuttering resumes. I have tried cleaning RAM, with no effect, so I don’t think it is a memory leak?